Two sets of skeletal remains found in Lorton eight months apart have been identified as brothers from Triangle, according to Fairfax County Police.

Last week, police said DNA evidence positively identified the two brothers, whose separate remains were found in 2010 and 2011 about a mile apart on Furnace Road, near a county landfill.

Police said both deaths were caused by blunt force trauma, and are being investigated as homicides.

Police said the Office of the Chief Medical Examiner determined the remains, found on opposite sides of Interstate 95, are those of Manuel De Jesus Mireles-Garcia, 32, and Alberto Mireles-Garcia, 31, both of the 18700 block of Fuller Heights Road.

The first set of remains was found July 12, 2010, in a wooded area about 300 yards east of Landfill Drive. Furnace Road, which runs for about three miles, connects routes 123 and 1 from north to south.

Fairfax County police said a passing motorist saw a deer around 8 p.m. that evening and stopped to take a photo of it. As the motorist stepped out of his vehicle, he discovered what appeared to be a human skull and other skeletal remains at the foot of the woods, police spokeswoman Tawny Wright said at the time.

Police said the subject appeared to have been dead for at least a year before being discovered.

The second set of remains was discovered on March 15. According to Fairfax County police, a man walking on Furnace Road between Richmond Highway and Old Colchester Road discovered what appeared to be partial skeletal remains near the bottom of a railroad bridge just off the roadway.

Prince William County police spokesman Jonathan Perok said Wednesday that neither brother was known to county Police.

“We are in contact with Fairfax County on this but it remains their case at this point,” he said.

A Prince William police officer close to the investigation, who asked to remain anonymous, said the brothers were of Mexican descent and were not known to have been lawbreakers.

“They were good brothers and hadn’t been in any trouble,” the officer said.

Fairfax County Police spokesman Eddy Azcarate said officers do not know whether both brothers were killed and buried together.

“We don’t yet know the answer to that,” he said. “To the best of my knowledge, detectives are working on two theories; one of which is that they were, and the other, which is that they were not. We really don’t know yet.”

Police ask anyone with information to call Fairfax County Police at 703-691-2131.